Help with my parameters corals really upset

[Cmendez49]

Hi guys my aquarium is a 150 sc aquarium
48x24x24
1 kessil Ap9x —- 2 a360x
No skimmer
Parameters
Alk 9.8
Calcium 421
Mag 1300
Nitrate 0 nyos
Phosphate 0.01
Salt 34.8
Temp 78.2
So I upgraded from my 75 about 2 months ago
My corals are all looking bad they have since I moved them over
Can anyone guide me in the right direction !
I run the lights peak for 5 hours 90 percent on the 360 and 50 percent on the 9x
Is this too much light ??? Not enough ??

 

[Stigigemla]

The combination of high kH and low N and P is the problem. You need to add some nitrate and phosphate as the symbiotic algae in the corals need that. Try to get the nitrate to at least 1 mg/l, 5 will be better. The phosphate should be att least 0,04 and not much over 0,10 mg/l. The tank looks like as it has not many fishes and little feeding. Try to feed the fishes a little more. 1 more feeding each day could be good. It would be good if you could connect a skimmer for a week or 2 to get the tank going. Now it is stuck in a circle with low pH and low coral growth. If You could get your pH up a bit the corals will grow better and rise the pH by their growth. When the pH is up to 8.2 or more you can disconnect the skimmer.
But remember: Skimmerless tanks are not for beginners. They are much more sensitive to pH falling or rising.
A good pH meter (always in the tank so not a stick) helps you to monitor the pH.